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<title>Algorithms_in_C++: sorting/shell_sort2.cpp File Reference</title>
<title>TheAlgorithms/C++: sorting/shell_sort2.cpp File Reference</title>
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<div id="projectname">Algorithms_in_C++<span id="projectnumber">&#160;1.0.0</span>
<div id="projectname">TheAlgorithms/C++<span id="projectnumber">&#160;1.0.0</span>
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<div id="projectbrief">Set of algorithms implemented in C++.</div>
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@@ -124,7 +141,9 @@ Include dependency graph for shell_sort2.cpp:</div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html">sorting</a></td></tr>
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<tr class="memitem:a4d76603c54d3dc56146e92d10a043924"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#a4d76603c54d3dc56146e92d10a043924">sorting::shell_sort</a> (T(&amp;arr)[N])</td></tr>
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<tr class="memitem:af2c5b92cbfe73f63f6074c61b0a45331"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#af2c5b92cbfe73f63f6074c61b0a45331">sorting::shell_sort</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; *arr)</td></tr>
<tr class="memitem:af2c5b92cbfe73f63f6074c61b0a45331"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#af2c5b92cbfe73f63f6074c61b0a45331">sorting::shell_sort</a> (std::vector&lt; T &gt; *arr)</td></tr>
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@@ -161,6 +180,8 @@ Functions</h2></td></tr>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a href="https://en.wikipedia.org/wiki/Shell_sort" target="_blank">Shell sort</a> algorithm </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/kvedala" target="_blank">Krishna Vedala</a> </dd></dl>
<p class="definition">Definition in file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a7eb77daed2cf1513f6d68c47a1c2db1c" name="a7eb77daed2cf1513f6d68c47a1c2db1c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7eb77daed2cf1513f6d68c47a1c2db1c">&#9670;&#160;</a></span>compare()</h2>
@@ -183,6 +204,8 @@ template&lt;typename T &gt; </div>
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<p>function to compare sorting using cstdlib's qsort </p>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00087">87</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 87</span> {</div>
<div class="line"><span class="lineno"> 88</span> T arg1 = *<span class="keyword">static_cast&lt;</span><span class="keyword">const </span>T *<span class="keyword">&gt;</span>(a);</div>
<div class="line"><span class="lineno"> 89</span> T arg2 = *<span class="keyword">static_cast&lt;</span><span class="keyword">const </span>T *<span class="keyword">&gt;</span>(b);</div>
@@ -218,28 +241,30 @@ template&lt;typename T &gt; </div>
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<p>Main function </p>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00183">183</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 183</span> {</div>
<div class="line"><span class="lineno"> 184</span> <span class="comment">// initialize random number generator - once per program</span></div>
<div class="line"><span class="lineno"> 185</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a>(NULL));</div>
<div class="line"><span class="lineno"> 185</span> std::srand(std::time(NULL));</div>
<div class="line"><span class="lineno"> 186</span> </div>
<div class="line"><span class="lineno"> 187</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(100); <span class="comment">// test with sorting random array of 100 values</span></div>
<div class="line"><span class="lineno"> 188</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 1 - 100 int values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 188</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 1 - 100 int values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 189</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(1000); <span class="comment">// test with sorting random array of 1000 values</span></div>
<div class="line"><span class="lineno"> 190</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 2 - 1000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 190</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 2 - 1000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 191</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(10000); <span class="comment">// test with sorting random array of 10000 values</span></div>
<div class="line"><span class="lineno"> 192</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 3 - 10000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 192</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 3 - 10000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 193</span> </div>
<div class="line"><span class="lineno"> 194</span> <a class="code hl_function" href="#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(100); <span class="comment">// test with sorting random array of 100 values</span></div>
<div class="line"><span class="lineno"> 195</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 1 - 100 float values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 195</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 1 - 100 float values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 196</span> <a class="code hl_function" href="#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(1000); <span class="comment">// test with sorting random array of 1000 values</span></div>
<div class="line"><span class="lineno"> 197</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 2 - 1000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 197</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 2 - 1000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 198</span> <a class="code hl_function" href="#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(10000); <span class="comment">// test with sorting random array of 10000 values</span></div>
<div class="line"><span class="lineno"> 199</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Test 3 - 10000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 199</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 3 - 10000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 200</span> </div>
<div class="line"><span class="lineno"> 201</span> <span class="keywordtype">int</span> i, NUM_DATA;</div>
<div class="line"><span class="lineno"> 202</span> </div>
<div class="line"><span class="lineno"> 203</span> <span class="keywordflow">if</span> (argc == 2)</div>
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<div class="line"><span class="lineno"> 204</span> NUM_DATA = atoi(argv[1]);</div>
<div class="line"><span class="lineno"> 205</span> <span class="keywordflow">else</span></div>
<div class="line"><span class="lineno"> 206</span> NUM_DATA = 200;</div>
<div class="line"><span class="lineno"> 207</span> </div>
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<div class="line"><span class="lineno"> 210</span> <span class="comment">// int array2 = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 211</span> <span class="keywordtype">int</span> range = 1800;</div>
<div class="line"><span class="lineno"> 212</span> </div>
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<div class="line"><span class="lineno"> 213</span> std::srand(time(NULL));</div>
<div class="line"><span class="lineno"> 214</span> <span class="keywordflow">for</span> (i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 215</span> <span class="comment">// allocate random numbers in the given range</span></div>
<div class="line"><span class="lineno"> 216</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1);</div>
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<div class="line"><span class="lineno"> 218</span> </div>
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<div class="line"><span class="lineno"> 219</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Unsorted original data: &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 220</span> <a class="code hl_function" href="#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 221</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 221</span> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 222</span> shell_sort(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA); <span class="comment">// perform sorting</span></div>
<div class="line"><span class="lineno"> 223</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 223</span> std::clock_t end = std::clock();</div>
<div class="line"><span class="lineno"> 224</span> </div>
<div class="line"><span class="lineno"> 225</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div>
<div class="line"><span class="lineno"> 226</span> &lt;&lt; <span class="stringliteral">&quot;Data Sorted using custom implementation: &quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 225</span> std::cout &lt;&lt; std::endl</div>
<div class="line"><span class="lineno"> 226</span> &lt;&lt; <span class="stringliteral">&quot;Data Sorted using custom implementation: &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 227</span> <a class="code hl_function" href="#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 228</span> </div>
<div class="line"><span class="lineno"> 229</span> <span class="keywordtype">double</span> elapsed_time = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) * 1.f / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 230</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Time spent sorting: &quot;</span> &lt;&lt; elapsed_time &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 229</span> <span class="keywordtype">double</span> elapsed_time = (end - start) * 1.f / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 230</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting: &quot;</span> &lt;&lt; elapsed_time &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 231</span> </div>
<div class="line"><span class="lineno"> 232</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 233</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 234</span>}</div>
<div class="ttc" id="aatoi_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/byte/atoi.html">std::atoi</a></div><div class="ttdeci">T atoi(T... args)</div></div>
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<div class="ttc" id="aendl_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div><div class="ttdeci">T endl(T... args)</div></div>
<div class="ttc" id="ahash__search_8cpp_html_a6e1a77282bc65ad359d753d25df23243"><div class="ttname"><a href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a></div><div class="ttdeci">int data[MAX]</div><div class="ttdoc">test data</div><div class="ttdef"><b>Definition</b> hash_search.cpp:24</div></div>
<div class="ttc" id="aquick__sort__3_8cpp_html_a07e5c62de28aeddea986890ce7ac1bda"><div class="ttname"><a href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a></div><div class="ttdeci">static void test_int()</div><div class="ttdef"><b>Definition</b> quick_sort_3.cpp:138</div></div>
<div class="ttc" id="arand_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a></div><div class="ttdeci">T rand(T... args)</div></div>
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<div class="ttc" id="ashell__sort2_8cpp_html_a951127aea9d7e1e53ea9ae0868633246"><div class="ttname"><a href="#a951127aea9d7e1e53ea9ae0868633246">show_data</a></div><div class="ttdeci">void show_data(T *arr, size_t LEN)</div><div class="ttdef"><b>Definition</b> shell_sort2.cpp:18</div></div>
<div class="ttc" id="asrand_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a></div><div class="ttdeci">T srand(T... args)</div></div>
<div class="ttc" id="atime_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a></div><div class="ttdeci">T time(T... args)</div></div>
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<div class="ttc" id="ahash__search_8cpp_html_a6e1a77282bc65ad359d753d25df23243"><div class="ttname"><a href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a></div><div class="ttdeci">int data[MAX]</div><div class="ttdoc">test data</div><div class="ttdef"><b>Definition</b> <a href="../../d1/df3/hash__search_8cpp_source.html#l00024">hash_search.cpp:24</a></div></div>
<div class="ttc" id="aquick__sort__3_8cpp_html_a07e5c62de28aeddea986890ce7ac1bda"><div class="ttname"><a href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a></div><div class="ttdeci">static void test_int()</div><div class="ttdef"><b>Definition</b> <a href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00138">quick_sort_3.cpp:138</a></div></div>
<div class="ttc" id="ashell__sort2_8cpp_html_a22ea0d1f7943ebb4371d31e44b465b6d"><div class="ttname"><a href="#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a></div><div class="ttdeci">void test_f(const int NUM_DATA)</div><div class="ttdef"><b>Definition</b> <a href="../../d4/d7a/shell__sort2_8cpp_source.html#l00145">shell_sort2.cpp:145</a></div></div>
<div class="ttc" id="ashell__sort2_8cpp_html_a951127aea9d7e1e53ea9ae0868633246"><div class="ttname"><a href="#a951127aea9d7e1e53ea9ae0868633246">show_data</a></div><div class="ttdeci">void show_data(T *arr, size_t LEN)</div><div class="ttdef"><b>Definition</b> <a href="../../d4/d7a/shell__sort2_8cpp_source.html#l00018">shell_sort2.cpp:18</a></div></div>
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@@ -318,20 +329,17 @@ template&lt;class T &gt; </div>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00018">18</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 18</span> {</div>
<div class="line"><span class="lineno"> 19</span> <span class="keywordtype">size_t</span> i;</div>
<div class="line"><span class="lineno"> 20</span> </div>
<div class="line"><span class="lineno"> 21</span> <span class="keywordflow">for</span> (i = 0; i &lt; LEN; i++) {</div>
<div class="line"><span class="lineno"> 22</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; arr[i] &lt;&lt; <span class="stringliteral">&quot;, &quot;</span>;</div>
<div class="line"><span class="lineno"> 22</span> std::cout &lt;&lt; arr[i] &lt;&lt; <span class="stringliteral">&quot;, &quot;</span>;</div>
<div class="line"><span class="lineno"> 23</span> }</div>
<div class="line"><span class="lineno"> 24</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 24</span> std::cout &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 25</span>}</div>
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@@ -357,15 +365,12 @@ template&lt;typename T , size_t N&gt; </div>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00032">32</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 32</span> {</div>
<div class="line"><span class="lineno"> 33</span> <a class="code hl_function" href="#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(arr, N);</div>
<div class="line"><span class="lineno"> 34</span>}</div>
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@@ -382,7 +387,9 @@ Here is the call graph for this function:</div>
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<p>Test implementation of shell_sort on float arrays by comparing results against <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>. </p>
<p>Test implementation of shell_sort on float arrays by comparing results against std::qsort. </p>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00145">145</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 145</span> {</div>
<div class="line"><span class="lineno"> 146</span> <span class="comment">// int array = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 147</span> <span class="keywordtype">float</span> *<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = <span class="keyword">new</span> <span class="keywordtype">float</span>[NUM_DATA];</div>
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<div class="line"><span class="lineno"> 150</span> <span class="keywordtype">int</span> range = 1000;</div>
<div class="line"><span class="lineno"> 151</span> </div>
<div class="line"><span class="lineno"> 152</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 153</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = ((<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1)) / 100.;</div>
<div class="line"><span class="lineno"> 153</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = ((std::rand() % range) - (range &gt;&gt; 1)) / 100.;</div>
<div class="line"><span class="lineno"> 154</span> }</div>
<div class="line"><span class="lineno"> 155</span> </div>
<div class="line"><span class="lineno"> 156</span> <span class="comment">/* sort using our implementation */</span></div>
<div class="line"><span class="lineno"> 157</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 157</span> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 158</span> shell_sort(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 159</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 160</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 161</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 159</span> std::clock_t end = std::clock();</div>
<div class="line"><span class="lineno"> 160</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 161</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 162</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 163</span> </div>
<div class="line"><span class="lineno"> 164</span> <span class="comment">/* sort using std::qsort */</span></div>
<div class="line"><span class="lineno"> 165</span> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 166</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;float&gt;</a>);</div>
<div class="line"><span class="lineno"> 167</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 165</span> start = std::clock();</div>
<div class="line"><span class="lineno"> 166</span> std::qsort(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;float&gt;</a>);</div>
<div class="line"><span class="lineno"> 167</span> end = std::clock();</div>
<div class="line"><span class="lineno"> 168</span> </div>
<div class="line"><span class="lineno"> 169</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 170</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 169</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 170</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 171</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 172</span> </div>
<div class="line"><span class="lineno"> 173</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
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<div class="line"><span class="lineno"> 178</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 179</span> <span class="keyword">delete</span>[] data2;</div>
<div class="line"><span class="lineno"> 180</span>}</div>
<div class="ttc" id="aqsort_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a></div><div class="ttdeci">T qsort(T... args)</div></div>
<div class="ttc" id="astructcompare_html"><div class="ttname"><a href="../../d1/db3/structcompare.html">compare</a></div><div class="ttdef"><b>Definition</b> huffman.cpp:36</div></div>
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<p>Test implementation of shell_sort on integer arrays by comparing results against <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>. </p>
<p>Test implementation of shell_sort on integer arrays by comparing results against std::qsort. </p>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00105">105</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 105</span> {</div>
<div class="line"><span class="lineno"> 106</span> <span class="comment">// int array = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 107</span> <span class="keywordtype">int</span> *<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = <span class="keyword">new</span> <span class="keywordtype">int</span>[NUM_DATA];</div>
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<div class="line"><span class="lineno"> 110</span> <span class="keywordtype">int</span> range = 1800;</div>
<div class="line"><span class="lineno"> 111</span> </div>
<div class="line"><span class="lineno"> 112</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++)</div>
<div class="line"><span class="lineno"> 113</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1);</div>
<div class="line"><span class="lineno"> 113</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = (std::rand() % range) - (range &gt;&gt; 1);</div>
<div class="line"><span class="lineno"> 114</span> </div>
<div class="line"><span class="lineno"> 115</span> <span class="comment">/* sort using our implementation */</span></div>
<div class="line"><span class="lineno"> 116</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 116</span> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 117</span> shell_sort(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 118</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 119</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 120</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 118</span> std::clock_t end = std::clock();</div>
<div class="line"><span class="lineno"> 119</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 120</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 121</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 122</span> </div>
<div class="line"><span class="lineno"> 123</span> <span class="comment">/* sort using std::qsort */</span></div>
<div class="line"><span class="lineno"> 124</span> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 125</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;int&gt;</a>);</div>
<div class="line"><span class="lineno"> 126</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 124</span> start = std::clock();</div>
<div class="line"><span class="lineno"> 125</span> std::qsort(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;int&gt;</a>);</div>
<div class="line"><span class="lineno"> 126</span> end = std::clock();</div>
<div class="line"><span class="lineno"> 127</span> </div>
<div class="line"><span class="lineno"> 128</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 129</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 128</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 129</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 130</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 131</span> </div>
<div class="line"><span class="lineno"> 132</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
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<div class="line"><span class="lineno"> 137</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 138</span> <span class="keyword">delete</span>[] data2;</div>
<div class="line"><span class="lineno"> 139</span>}</div>
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